メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.430803411328 43.0601357596549, 141.431890729846 43.060102455657, 141.431965575134 43.0610242453883, 141.432005504294 43.0615563690701, 141.432057725555 43.0622535052157, 141.430948999139 43.0622999505478, 141.430309593917 43.0623168988113, 141.429949478326 43.0623278253583, 141.429871641474 43.0612654199928, 141.429794853488 43.060189239384, 141.429779947003 43.0601490447397, 141.430221494726 43.0601370134393, 141.430803411328 43.0601357596549)) ^^http://www.opengis.net/ont/geosparql#wktLiteral